A flat roof is a roofing system that’s nearly level, with a slight pitch to allow water drainage. Benefits of Flat Roofs Best Materials for Flat Roof Systems 1. EPDM (Ethylene Propylene Diene Monomer): A durable and flexible rubber membrane. How Flat Roofs Are Installed Next, a waterproof membrane https://flat-roof-installation-and-repair.trustedstandard.com